What is WHOIS?
WHOIS is the name of a searchable database maintained by the registrar, which contains information about domain names, and the contacts associated with them.

What does WHOIS do?
WHOIS provides you with information about the domain name and what server it’s on, where it’s registered, and sometimes, when it will expire or will become available.

You can check Domain Whois using the link below

https://rythost.com/whois.php

EXAMPLE BELOW:

rythost.com domain lookup results from whois.verisign-grs.com server:

Domain Name: RYTHOST.COM
Registry Domain ID: 2097628306_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.PublicDomainRegistry.com
Registrar URL: http://www.publicdomainregistry.com
Updated Date: 2017-01-20T07:24:45Z
Creation Date: 2004-02-14T13:02:11Z
Registry Expiry Date: 2025-02-14T13:02:11Z
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.RYTHOST.COM
Name Server: NS2.RYTHOST.COM

Status values can be one or more of the following (each will appear on its own line if set):

ACTIVE:
The registry sets this status. The domain can be modified by the
registrar. The domain can be renewed. The domain will be included in the
zone if the domain has been delegated to at least one name server.

REGISTRY-LOCK:
The registry sets this status. The domain can not be modified or
deleted by the registrar. The registry must remove the REGISTRY-LOCK
status for the registrar to modify the domain. The domain can be
renewed. The domain will be included in the zone if the domain has been
delegated to at least one name server.

REGISTRY-HOLD:
The registry sets this status. The domain can not be modified or
deleted by the registrar. The registry must remove the REGISTRY-HOLD
status for the registrar to modify the domain. The domain can be
renewed. The domain will not be included in the zone.

REGISTRAR-LOCK:
The sponsoring registrar sets this status. The domain can not be
modified or deleted. The registrar must remove REGISTRAR-LOCK status to
modify the domain. The domain can be renewed. The domain will be
included in the zone.

REGISTRAR-HOLD: The
sponsoring registrar sets this status. The domain can not be modified or
deleted. The registrar must remove REGISTRAR-HOLD status to modify the
domain. The domain can be renewed. The domain will not be included in
the zone.

Source: https://allgist.ng/view/35